Portable concrete mixer



Filed Nov. '7, 1927 R & mm H N N R m mz r 4 a m NH m if L Patented Apr. 8, 1930 1 UNITED STATES PORATION OF CALIFORNIA REGINALD A. DADDISMAN, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR TO BARRY- MORE CONCRETE MIXER CORPORATION, OF SAN FRANCISCO, CALIFORNIA, A. COR- 1 PORTABLE CONCRETE MIXER Application filed November 7, 1927. Serial No. 231,414.

This invention relates to portable concrete mixers as mounted on motor trucks and of the type wherein an open top mixer trough is provided with mixing mechanism operated by the truck motor, and water is carried in a tank or tanks on the truck for admission to the concrete materials within the trough when mixing the batch.

The object of the invention is to provide means whereby the cement may be carried separately from the other materials and admitted thereto at the time of mixing.

In the drawings hereto Fig. 1 is a side elevation of about half of a mixing trough mounted on the chassis frame of a motor truck, and fitted with my cement carrying receptacle. Fig. 2 is an end elevation of the same.

Since the invention concerns the cement carrying receptacle in relation to the mixing trough no showing of the motor truck, mixing drive or paddles is attempted as these form no feature of the invention.

In detail the drawings show at 1 the frame of the mixer pivotally supported at 2 to fixed members as at 3 on the motor truck so that the mixing trough 4 may be tilted to dump its contents out of a rear door 25.

Along the upper sides of the mixing trough 4c are water tanks 5 suitably piped in a manner not shown so that the water may be run into the trough as desired.

Mounted above the mixing trough and toward the rear end of same, is a receptacle 6 adapted to receive a quantity of cement.

This receptacle 6 is provided with a dumping bottom comprising a pair of plates 7 and 8 suitably reinforced with angle irons as indicated and respectively pivoted on longitudinal axes on shafts 9, 10 secured to the plates and rotatably projecting out of the ends of the receptacle as indicated. I

The plates 7 and 8 are of a size to overlap slightly and fit against a small rabbet when closed so as to form a bottom for the receptacle, while at the ends of the shafts 910 are secured cranks 1112 in turn pivoted to links 13, 14 both pivoted at 15 to a push rod 16 slidably supported in a bracket 17 so that upon sliding the rod upward to the full line position shown in the drawing the two sections 78 of the bottom will tilt reversely for discharge of the contents of the receptacle 6 into the mixing trough, and when pulling the rod downwardly to the dotted position the sections 7-8 will lie horizontal and close the bottom of the receptacle, the weight of the rod 16 and action of linkage stabilizing the pivoted bottom section in closed position.

In use it is contemplated that the gravel or rock and sand be loaded into the mixer trough 4 from above, and the cement in dry state in receptacle 6, and the necessary water in tanks 5, then after transporting the materials to the point of use, the cement is dropped into the other material in the trough, water run in from the tanks 5', the batch mixed and discharged from door 5 by tilting the mixer or otherwise.

I claim:

1. In a concrete mixer of the portable type, an open top mixingtrough longitudinally arranged on a motor truck, a cement bin only mounted above one end of and extending across the trough leaving the remainder of the trough unobstructed and readily available for the dumping therein of rock and.

sand, and means for discharging the contents of the cement bin into the trough, said trough provided with a discharge gate for closing during the mixing of concrete therein.

2. In a concrete mixer of the portable type,-

an open top mixing trough longitudinally arranged on a motor truck, a cement bin mounted above one end of the trough leaving the remainder of the trough unobstructed and readily available for the dumping therein of rock and sand, a door on the bottom of said bin arranged for discharge of cement from the bin to said trough along the side wall of the trough, said trough provided with a discharge gate for closing during the mixing of concrete therein.

3. In a concrete mixer of the character described, a mixing trough, a cement container mounted above the trough, a pair of plates forming the bottom of said container pivoted trough and substantially along the center of said plates and so arranged that upon tipping the plates on said axes the contents of the container will discharge Within and adjacent the sides cf the trough, and means for tipping the plates.

REGINALD A. DADDISMAN. 

